Methods, Apparatuses and Systems Facilitating Seamless, Virtual Integration of Online Membership Models and Services

ABSTRACT

Methods, apparatuses and systems facilitating integration of the functionality associated with a first on-line service entity with the functionality associated with a second on-line service entity. Embodiments of the present invention allow a first on-line service entity having its own membership model to efficiently collaborate with a second on-line service entity to offer its users the services of the second on-line service entity in a seamless and consistently branded manner. One implementation obviates the need for synchronization of the membership models between the first and second on-line service entities. One implementation allows the second on-line service entity to provide services to the users associated with the first on-line service entity in a seamless manner without the first on-line service entity having to proxy the session between the second online service entity and the users.

CROSS-REFERENCE TO RELATED APPLICATION

The present application is a continuation application of U.S. patentapplication Ser. No. 11/963,253 entitled “Methods, Apparatuses andSystems Facilitating Seamless, Virtual Integration of Online MembershipModels and Services” filed Dec. 21, 2007, issuing as U.S. Pat. No.8,359,393 on Jan. 22, 2013, which is a continuation application of U.S.patent application Ser. No. 10/778,532 entitled “Methods, Apparatusesand Systems Facilitating Seamless, Virtual Integration of OnlineMembership Models and Services” filed on Feb. 13, 2004, issued as U.S.Pat. No. 7,337,468 on Feb. 26, 2008, which claims priority toProvisional Application No. 60/447,224 entitled “Methods, Apparatusesand Systems Facilitating Seamless, Virtual Integration of OnlineMembership Models and Services” filed Feb. 13, 2003, all of which areincorporated herein by reference in their entirety.

FIELD OF THE INVENTION

The present invention relates to computer networks and, moreparticularly, to methods, apparatuses and systems facilitating theintegration of services offered by a first on-line service entity withthe services offered by a second on-line service entity. In oneembodiment, the present invention facilitates the integration ofnetwork-based credit data retrieval and reporting systems with thirdparty web sites and other network-based functionality.

BACKGROUND OF THE INVENTION

Providers of on-line or network-based services typically support useraccounts into which users log to persist user account data, such as usernames, passwords, addresses, payment information, preferences, etc. Suchproviders typically maintain their own proprietary, unique membershipmodel including what types of membership data is maintained. When twoseparate on-line service providers desire to collaborate to extend theservices or other functionality offered by one service provider with theservices or functionality offered by the second service provider, theprior art methodology typically requires the two organizations toeither 1) expend a large effort to bi-directionally synchronize theinformation associated with each organization's membership model anduser account data, and/or 2) have one service entity proxy the sessionbetween the second service entity and the user. For technical andsometimes other reasons, such exchanges of data are not desirable.Moreover, for legal or other reasons, it is desirable and/or mandated bylaw or otherwise, that the data exchanged between a user and a firston-line service provider not flow through a second on-line serviceprovider acting essentially as a proxy. This requirement, however,presents certain technical challenges when collaborating on-line serviceproviders desire that their respective users experience a consistentlybranded service.

In light of the foregoing, a need in the art exists for methods,apparatuses and systems that facilitate collaboration between on-lineservice entities. A need in the art further exists for methods,apparatuses and system facilitating the integration of services offeredby a first on-line service entity into the services provided by a secondon-line service entity. A need further exists for methods, apparatusesand systems that allow for seamless, virtual integration of on-lineservice functionality without having one on-line service entity actingas a proxy for a second on-line service entity. Embodiments of thepresent invention substantially fulfill these needs.

SUMMARY OF THE INVENTION

The present invention provides methods, apparatuses and systemsfacilitating integration of the functionality associated with a firston-line service entity with the functionality associated with a secondon-line service entity. Embodiments of the present invention allow afirst on-line service entity having its own membership model toefficiently collaborate with a second on-line service entity to offerits users the services of the second on-line service entity in aseamless and consistently branded manner. Moreover, embodiments of thepresent invention obviate the need for synchronization of the membershipmodels between the first and second on-line service entities. Inaddition, embodiments of the present invention allow the second on-lineservice entity to provide services to the users associated with thefirst on-line service entity in a seamless manner without the firston-line service entity having to proxy the session between the secondonline service entity and the users. This approach, for example, allowsone on-line service entity to leverage its existing membership modelwith the offerings of a second on-line service entity, such as anon-line credit report service, without having to transmit any sensitivecredit or other user information between the entities.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is a functional block diagram illustrating a computer networkenvironment including the functionality associated with a firstembodiment of the present invention.

FIG. 2 is a flow chart diagram illustrating a method, according to animplementation of the present invention, directed to generating sessionidentifiers in response to requests from third-party web sites.

FIG. 3 is a flow chart diagram providing a method, according to oneimplementation of the present invention, directed to interacting withusers who have been redirected to a server or cluster or servers thatissued session identifiers.

DESCRIPTION OF PREFERRED EMBODIMENT(S) I. Overview of OperatingEnvironment

As FIG. 1 provides, an embodiment of the present invention operates in acomputer network environment comprising at least one credit reportingbureau 20, credit scoring engine 25, third-party web site 30, creditdata retrieval system 50, and at least one client computer 60 associatedwith one or more individual users. Computer network 90 can be anysuitable computer network, including the Internet or any wide areanetwork. In one embodiment, users access credit data retrieval system 50over computer network 90 with a network access device, such as clientcomputer 60 including suitable client software, such as a web browser,for transmitting requests and receiving responses over a computernetwork. However, suitable network access devices include desktopcomputers, laptop computers, Personal Digital Assistants (PDAs), and anyother wireless or wireline device capable of exchanging data overcomputer network 90 and providing a user interface displaying datareceived over computer network 90. In one embodiment, the presentinvention operates in connection with an HTML compliant browser, such asthe Microsoft Internet Explorer® or Netscape Navigator® browsers.

In one embodiment, credit data retrieval system 50 comprises Web/HTTPserver 52, application server 54, database server 56 and web servicesnetwork gateway 55. Web/HTTP server 52 is operative to establish HTTP orother connections with client computers 60 (or other network accessdevices) to receive requests for files or other data over computernetwork 90 and transmit responses in return, as discussed herein. In oneembodiment, Web/HTTP server 52, or at least the HTTP serverfunctionality that operates in connection with third-party web site 30,is operative to establish privileged sessions; that is, Web/HTTP server52 only generates sessions and creates session IDs indirectly for usersonly in connection with partner third-party web sites 30 afterauthentication (such as verification or validation of a digitalsignature of third-party web site 30) (see below). Users, at clientcomputers 60 require a valid session ID (obtained from or in connectionwith third-party web site 30, as discussed below) to access Web/HTTPserver 52 and, therefore, the functionality of credit data retrievalsystem 50. Accordingly, this configuration allows users associated withthird-party web site 30 to reinitiate a session only through third-partyweb site 30. In one embodiment, credit data retrieval system 50 furtherincludes an additional Web/HTTP server (not shown), including an IPaddress different from Web/HTTP server 52, that operates in aconventional manner to process requests and responses for direct users(i.e., users not associated with third-party web site 30) of credit dataretrieval system 50.

Otherwise, Web/HTTP server 52, in one embodiment, incorporatesconventional HTTP server and connection state management functionality.In one embodiment, Web/HTTP server 52 passes user requests toapplication server 54 which composes a response and transmits it to theuser via web server 52. In one embodiment, web server 52 establishes asecure connection to transmit data to users and other sites, using theSSL (“Secure Sockets Layer”) encryption protocol part of the HTTP(S)(“Secure HTTP”) protocol, or any other similar protocol for transmittingconfidential or private information over an open computer network.Database server 56 stores the content and other data associated withoperation of credit data retrieval system 50. Application server 54, inone embodiment, includes the functionality handling the overall processflows, described herein, associated with credit data retrieval system50. Application server 54, in one embodiment, accesses database server56 for data (e.g., HTML page content, etc.) to generate responses touser requests and transmit them to web server 52 for ultimatetransmission to the requesting user. As one skilled in the art willrecognize, the distribution of functionality set forth above among webserver 52, database server 56 and application server 54 is not requiredby any constraint. The functionality described herein may be included ina single logical server or module or distributed in separate modules. Inaddition, the functionality described herein may reside on a singlephysical server or across multiple physical servers. In addition,although one web server 52 is depicted in FIG. 1, multiple web serversmay be used in connection with session clustering to store session stateinformation in a central database for use by the multiple web servers,and to provide for failover support.

In one embodiment, third-party web site 30 comprises web server 32,application server 34 and database server 36. Web server 32 receivesrequests for files or other data over computer network 40 and passesthem to application server 34. In one embodiment, web server 32transmits data to users and other sites using the HTTP and relatedprotocols, or any other similar protocol for transmitting data over acomputer network. In one embodiment, database server 36 stores contentand other data relating to the operation of the third-party web site 30.Application server 34, according to one embodiment, accesses databaseserver 36 and generates pages or other files that web server 32transmits over computer network 90 to the intended recipient. Asdiscussed more fully below, third-party web site 30 offers its users theability to obtain credit report information by advertising theseservices on the web pages, such as its home page, it serves to users.Users who opt for such services click on links or otherwise communicatea request to order the services, thereby triggering the methodology andprotocols discussed below.

Credit scoring engine 25, in one embodiment, is a web-based applicationservice operative to compute a credit score given a set of credit data.Credit scoring engine 25 is operative to receive credit report datarelating to an individual or other entity and process the data against aproprietary or other credit scoring model to yield a credit score.Suitable credit scoring models including a FICO® credit scoring model,CreditXpert®, TransRisk®, or any other suitable credit scoring model. Inone embodiment, credit scoring engine 25 is a stand-alone web-basedapplication remote from credit data retrieval system 50 and/or creditreporting bureau 20. In other embodiments, the functionality of creditscoring engine 25, however, is integrated into other componentsassociated with computer network 90. For example, credit scoring engine25 may be incorporated as an internally executed application (such asCreditXpert) within credit data retrieval system 50, or within creditreporting bureau 20.

Credit reporting bureau 20 maintains a database or other repository ofcredit history data for at least one individual or other entity, such asthe credit reporting services offered by TransUnion®, Equifax®, andExperian®. Credit reporting bureau(s) 20 offer web-based creditreporting application services. In one embodiment, at least one creditreporting bureau 20 is operative to access credit scoring engine 25 inresponse to a request from credit data retrieval system 50; in such anembodiment, the credit reporting bureau 20 transmits the creditreporting data associated with the individual to credit scoring engine25 and receives a credit score in return. The credit reporting bureau 20then returns the credit score with the credit report data to credit dataretrieval system 50. In one embodiment, credit data retrieval system 50formulates an XML request and transmits it to credit reporting bureau 20to retrieve credit report data. In one embodiment, the XML requestformat includes a flag or other indication of whether a credit score isalso desired. Credit reporting bureau 20 responds to the asynchronous orsynchronous request by transmitting an XML response including creditreport data corresponding to the individual identified in the XMLrequest. In one embodiment, credit data retrieval system 50 operates inconnection with one credit reporting bureau, such as TransUnion,Equifax, or Experian; however, in other embodiments, credit dataretrieval system 50 obtains credit report data for a particularindividual from at least two credit reporting bureaus 20 and merges thedata into a single report. Co-pending and commonly owned applicationSer. No. 09/644,139 filed Aug. 22, 2000 in the name of Guy et al. andentitled “Credit and Financial Information and Management System”discloses methods and systems that obtain credit report data frommultiple sources and merge such data into a single report (incorporatedby reference herein).

As discussed above, credit data retrieval system 50 further includesnetwork services gateway 55 which implements web services networkfunctionality to process and route service requests and responses over acomputer network. In one embodiment, network services gateway 55implements a communications model based on requests and responses.Network services gateway 55 generates and transmits a service request toan external vendor, such as credit reporting bureau 20 and/or creditscoring engine 25, which receives the request, executes operations ondata associated with the request, and returns a response. Networkservices gateway 55, in one embodiment, further includes other webservices functionality such as logging of service requests and responsesallowing for tracking of costs and usage of services. Network servicesgateway 55, in one embodiment, relies on secure HTTP communications andXML technologies for request and response formats. In one embodiment,network services gateway 55 maintains Document Type Definitions (DTDs)and/or XML Schema Definitions (XSDs) that define the format of the XMLrequest and XML response. Request and response XSDs, in one form,include a message type, transaction identification, vendor/serviceidentification, and an application identification.

As one skilled in the art will recognize various embodiments arepossible. For example, the credit retrieval functionality of system 50may be incorporated into the functionality of credit reporting bureau20. In addition, the functionality of credit scoring engine 25 may beincorporated into credit reporting bureau 20.

II. Operation A. New Orders for Credit Reports

FIG. 1 further illustrates the overall message and process flowassociated with an embodiment of the present invention. In addition,FIGS. 2 and 3 illustrate methods performed, in one implementation, bycredit report retrieval system 50. As FIG. 1 illustrates, a user atclient computer 60 accesses third-party web site 30 by inputting the URLor IP address of web site 30 into the location bar of the browser orother client-side application resident on client computer 60 (Ref. No.1). As discussed above, third-party web site 30 offers credit reportingservices to the user by adding appropriate links and content to at leastsome of the web pages it serves. In one embodiment, third-party web site30 presents an order page to the user requiring the user to enterpersonal information sufficient to identify the user for purposes ofpulling a credit report and also requires the user to enter paymentinformation, such as a credit card account number and expiration date.Third-party web site 30, in one embodiment, processes the paymenttransaction using the user-supplied information in a conventional or anysuitable manner.

In one embodiment, if the payment transaction is authorized, third partyweb site 30 then transmits a receipt page to the user seekingconfirmation of the order. When the user confirms the order by, forexample, clicking on an “accept” button or other interface control,third-party web site 30 then composes and transmits a request for asession ID from credit data retrieval system 50 (Ref No. 2). In oneembodiment, the request includes a unique userid, co-brand id,transaction information, the user's social security number (SSN), firstname, last name, address, and email. In one embodiment, the request isformatted as an XML request. In one embodiment, the request is digitallysigned with the private key of the third-party web site 30 and encryptedwith the public key corresponding to credit data retrieval system 50.

In one embodiment, third-party web site 30 then posts this request tocredit data retrieval system 50, which receives the request (FIG. 1,102) operates on the request to generate a session ID and return it in aresponse to third-party web site 30 (Ref. No. 3). In one embodiment, thefunctionality associated with the credit data retrieval system 50 thatgenerates session IDs is presented as a web-based application serviceaccessible to third-party web site 30 via Simple Object Access Protocol(SOAP) based protocols and technologies. In one embodiment, credit dataretrieval system 50 verifies the digital signature associated with thesession ID request (104), decrypts the data using its private key (106),and initiates processing of the request. Credit data retrieval system50, in one implementation, uses the state management functionality ofweb/HTTP server 52 to generate a session for the end user identified inthe request (108) and returns a session ID to third-party web site 30(Ref. No. 3) (110). Credit data retrieval system 50 also stores theuser's personally identifying information in association with thesession ID for later use (112).

After receipt of the session ID, third-party web site 30 sets thesession ID on the browser executed on client computer 60 in the form ofa cookie and redirects the end user's browser to the credit dataretrieval system to begin the authentication/fulfillment process (Ref.No. 4). In one embodiment, third-party web site 30 uses HTML frames toallow the user's experience to be branded with the third-party web siteidentifiers. For example, third-party web site 30 may use a title (top)frame, a left (navigation) frame and a main/body frame including themajority of the content. According to this embodiment, the redirectionmessage (e.g., an HTML page including a meta refresh tag pointing to theURL of credit data retrieval system 50) is transmitted to the browserwithin the context of a main/body frame. Other embodiments are possible.For example, the use of HTML frames is only one preferred embodiment.The redirection message can also be transmitted within the context of anew or pop-up browser window, or within the context of a new HTML pagetransmitted to the same browser window.

The redirection message and process flow can take a variety of forms. Asdiscussed above, the redirection message may comprise an HTML pageincluding a meta refresh tag and the URL or IP address associated withthe credit data retrieval system 50. In another embodiment, the HTMLpage may include JavaScript in the HTML page that, when executed withinthe context of the user's browser, is operative to generate an HTTP GETrequest to credit data retrieval system 50. In another embodiment,third-party web site 30, rather than directly interacting with creditdata retrieval system 50 to obtain a session ID, transmits an HTML pageincluding an operative, such as Javascript code or a link embedded inthe HTML page, to cause the browser on client computer 60 to generate anHTTP POST request to credit data retrieval system 50 including a requestfor a session identifier that, in one implementation, includes the userinformation discussed above, and is digitally signed by third-party website 30, encrypted, and encoded in a hidden field. Credit data retrievalsystem 50, as discussed above, verifies the digital signature anddecrypts the user information data and generates a session ID andreturns it directly to the user's browser.

When the browser processes the redirection message and transmits therequest to credit data retrieval system 50, web/HTTP server 52 receivesthe request (FIG. 3, 202) and looks up the session ID contained in thecookie included in the request header against a session state databaseas with other conventional HTTP requests (204). Assuming the session IDis valid, credit retrieval system 50 then initiates the authenticationand reporting functionality and interacts directly with the user atclient computer 60 (Ref. No. 5) for the remainder of the session. In oneembodiment, credit retrieval system 50 first presents at least oneagreement associated with a credit reporting bureau to the user andprompts the user for acceptance or rejection of the agreement (206). Ifthe user accepts the agreement, credit data retrieval system 50 accessescredit reporting bureau 20 for a credit report corresponding to theuser, using the personally identifying information originally obtainedfrom third-party web site 30 (208). In one embodiment, credit dataretrieval system 50 authenticates the user by prompting him/her forinformation contained in the credit report and matching the user'sresponse against the credit report data (210). As one skilled in the artwill recognize, any suitable authentication protocol can be used. Forexample, the authentication protocols disclosed in U.S. Pat. No.6,263,447, incorporated by reference herein, can be incorporated intoembodiments of the present invention.

Assuming the user is authenticated, credit data retrieval system 50 thentransmits an HTML page including the credit report to the user (214). Asdiscussed above, in one embodiment, credit data retrieval system 50includes an order for a credit score and displays the results to theuser, as well. As one skilled in the art will recognize, various processflows can be implemented for delivering credit report functionality tousers. For example, the user may be provided a combined credit report asdescribed in U.S. application Ser. No. 09/644,139, incorporated byreference herein. In one embodiment, after or before the user views thecredit report, credit data retrieval system 50 establishes a useraccount and password (in one embodiment, provided by the user) andstores the retrieved credit report (for subsequent viewing) inassociation with the user account (212). In one embodiment, credit dataretrieval system 50 uses the userid supplied by third-party web site 30as the user account identifier. In one embodiment, the user account isalso tagged with the co-brand id corresponding to third-party web site30. After the session is terminated (216), credit data retrieval system50 redirects the user's browser to third-party web site 30 (218). Togain subsequent access to credit reporting data, the user must accessthird-party web site 30 to initiate another session with credit dataretrieval system 50, as described below.

B. Viewing an Existing Credit Report

The functionality described herein, in one embodiment, also allows theuser to gain subsequent and continued access to his or her user accountthrough the context of third-party web site 30. In one embodiment, theuser logs into or otherwise accesses third party web site 30 and electsto view an existing credit report stored in a user account, as discussedabove. Third party web site 30 formulates a request for a session ID,including a userid, transaction information (such as “view existingorder”) and co-brand id, as discussed above. Credit data retrievalsystem 50 verifies the digital signature, decrypts the request, andgenerates a session ID and transmits it to third party web site 30.Credit data retrieval system 50 also stores the userid and othertransaction information in association with the session ID for lateruse. When the user is redirected to credit data retrieval system 50, itprompts the user for a user name and password. In one embodiment, creditdata retrieval system 50 uses the userid supplied by third-party website 30 to identify the user. If the user inputs a valid user name andpassword, credit data retrieval system 50 displays the credit report, ifany, associated with the user account. Once logged in, the user has theoption of ordering other services and/or ordering a new credit report.

Although the present invention has been described relative to specificembodiments, it is not so limited. For example, although the embodimentsdiscussed above allow for the integration of a credit data retrievalsystem with a third-party web site, the present invention hasapplication to a wide variety of online services. In addition, manymodifications and variations of the embodiments described above willbecome apparent. For example, although the embodiments described aboveemployed HTML, HTTP(S) and XML protocols and technologies, the presentinvention can use any suitable communications and data exchangetechnologies and protocols. Furthermore, other changes in the details,steps and arrangement of various elements may be made by those ofordinary skill in the art without departing from the scope of thepresent invention. Accordingly, the present invention has been describedwith reference to specific embodiments. Other embodiments of the presentinvention will be apparent to one of ordinary skill in the art. It is,therefore, intended that the claims set forth below not be limited tothe embodiments described herein.

What is claimed is:
 1. A web application host system capable offacilitating integration of separate online services, comprising: atleast one memory; and at least one processor communicatively coupled tothe at least one memory for executing instructions stored therein forimplementing a web service environment adapted to host a web applicationand facilitate integration with a third-party web application, theinstructions comprising: a session state module for: generating asession identifier in response to a request for a session identifier;maintaining session state information in association with the sessionidentifier, wherein the session state information includes useridentifying information; and a server module for: receiving a requestfor a session identifier from a third-party web application host systemhosting the third-party web application, wherein the third-party webapplication host system request includes user identifying information;authenticating the request for a session identifier; accessing thesession state module to obtain a session identifier for theauthenticated request; transmitting the session identifier to thethird-party web application host system in response to the request forthe session identifier; receiving a request from a user, wherein therequest includes the session identifier transmitted to the third-partyweb application host system; and controlling access to resourcesavailable to the user through the web application host system byvalidating the session identifier in the request from the user againstthe session state information maintained by the session state module. 2.The system of claim 1, further comprising: an application moduleoperative to host the web application to provide a service to at leastone user; and wherein the server module is operative to control accessto the application module.
 3. The system of claim 1, wherein the requestfor a session identifier includes a digital signature created with anencryption key associated with the third-party web application; andwherein the server module is operative to authenticate the request for asession identifier by validating the digital signature.
 4. The system ofclaim 1, wherein the request for a session identifier is encrypted; andwherein the server module is further operative to decrypt the requestfor a session identifier.
 5. The system of claim 4, wherein the requestfor a session identifier is encrypted; and wherein the server module isfurther operative to decrypt the requests for a session identifier ifthe digital signature of the third-party web application is valid. 6.The system of claim 1, wherein the requests for a session identifierfurther comprise a third-party web application identifier, and whereinthe state information maintained by state management module furthercomprises the third-party web application identifier.
 7. The system ofclaim 1, wherein the request for a session identifier is transmitteddirectly by the third-party web application host system.
 8. A webapplication host system capable of facilitating integration of separateonline services, the system comprising: at least one memory; and atleast one processor communicatively coupled to the at least one memoryfor executing instructions stored therein for implementing a web serviceenvironment adapted to host a web application and facilitate integrationwith a third-party web application, the instructions comprising thesteps of: receiving a request for a session identifier from athird-party web application host system hosting the third-party webapplication, wherein the third-party web application host system requestincludes user identifying information; authenticating the request for asession identifier; generating a session identifier in response to arequest for a session identifier; maintaining session state informationin association with the session identifier, wherein the session stateinformation includes user identifying information; transmitting thesession identifier to the third-party web application host system inresponse to the request for the session identifier; receiving a requestfrom a user, wherein the request includes the session identifiertransmitted to the third-party web application host system; andcontrolling access by the user to resources available through webapplication host system by validating the session identifier in therequest from the user against the maintained session state information.9. The system of claim 8, wherein the request for a session identifierincludes a digital signature created with an encryption key associatedwith the third-party web application; and wherein the request for asession identifier is authenticated by validating the digital signature.10. The system of claim 8, wherein the request for a session identifieris encrypted; and wherein the instructions further comprise the step ofdecrypting the request for a session identifier.
 11. A systemfacilitating integration of separate on-line services over a network,the system comprising: a first server associated with a first on-lineservice, the first server operative to initiate a session and generate asession identifier in response to a request transmitted by anauthenticated on-line service system associated with a second on-lineservice; provide the session identifier to the authenticated on-lineservice system associated with the second on-line service; and interactwith a host system associated with a user that transmits a message thatincludes the session identifier provided to the authenticated on-lineservice system associated with the second on-line service; a secondserver operative to interact with the host system associated with theuser; initiate, on behalf of the user, a session with the first serverby transmitting a request to the first server and receiving a sessionidentifier in response; provide to the host system associated with theuser, the session identifier received from the first server in aredirection message, wherein the redirection message is operative tocause the host system associated with the user to transmit a message,including the received session identifier, to the first server, whereinthe redirection message is transmitted within the context of a frame ofa web page, and wherein the second server does not have access to datatransmitted between the user and the first server during the initiatedsession.
 12. The system of claim 11, wherein the redirection messagecomprises a HTML page including a meta refresh tag and the URL ornetwork address corresponding to the first on-line system.
 13. Thesystem of claim 11, wherein the redirection message comprises a pageincluding a script, when executed by the host system associated with theuser, causes the host system to transmit a message, including thereceived session identifier, to the first server.
 14. The system ofclaim 11, wherein the web page comprises at least one additional frameincluding branding information associated with the second server.